Improved taginput
This PR provides replacement of the tagsinput with the implementation based on select2.
instead one tag I prepared few ones:
- inputTags - shows tag widget that would map it's value to a single form field
- selectTags - shows tag widget that would map it's value to a array form field
New widget provides also typeahead autocomplete.
Please note that this is a breaking change, however it would easy to refactor code since change would generate compilation errors.